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唐翔(2008)放宽巴萨模型假设条件,提出了更为现实的解释国家间价格水平差异的富人社区效应模型。然而,该模型基本形式与巴萨模型在计量上难以区分。文章将富人社区效应模型做了进一步扩展,构建了能够识别其与巴萨模型区别的计量检验形式。随后,通过放松非技能工人只能生产非贸易品的假设,又构建了符合当代世界外包生产情况的富人社区效应当代模型,使之能对高收入和低收入国家间物价水平的不同表现进行理论预测。通过对基于1990~2010年面板数据的联立方程进行估计发现,在高收入国家中,非技能劳动力比重对物价水平有极大的负向影响,并超过了其通过影响人均收入而对价格水平产生的间接影响;然而,在低收入国家中这种情况并不成立。这表明,富人社区效应模型对国家间价格水平差异的现实解释力是优于巴萨模型的,具有普适意义。
Tang (2008) relaxed the assumptions of the Barca model and proposed a more realistic model of the rich community effect explaining the difference in price levels among countries. However, the basic form of the model and the Barcelona model are difficult to measure. The article further expands the model of the community effect of rich people and builds a metrological test form that distinguishes it from the Barcelona model. Subsequently, by relaxing the assumption that unskilled workers can only produce non-tradable goods, a contemporary model of the rich community effect that is consistent with the outsourced production in the contemporary world is constructed so that different performance of price levels among high- and low-income countries can be carried out Theoretical prediction. By estimating the simultaneous equations based on the panel data from 1990 to 2010, it is found that in the high-income countries, the proportion of unskilled labor has a great negative impact on the price level and surpasses its impact on the price level by affecting per capita income However, this is not the case in low-income countries. This shows that the rich community effect model of the real power of the price differences between countries is better than the Barcelona model, with universal significance.